The following table gives the number of fresh registrations of scooters and motorcycles in a city in three years. In which year(s) did the number of fresh registrations of both scooters and motorcycles separately AND together register fluctuation of more than 50%?

Vehicle Year	2004-05	2005-06	2006-07
Scooters	904	1316	2017
Motorcycles	1654	2019	722

Correct option is D

SOLUTION:
2004-05 to 2005-06:
Scooters: $$\frac{1316}{904}$$​ = 1.45 (45% increase)
Motorcycles: $$\frac{2019}{1654}$$​ = 1.22 (22% increase)
2005-06 to 2006-07:
Scooters: $$\frac{2017}{1316}$$​ = 1.53 (53% increase)
Motorcycles: $$\frac{722}{2019}$$​ = 0.36 (64% decrease)
We are looking for the year(s) where both scooters and motorcycles had a fluctuation of more than 50%.
2005-06:
Scooters: 45% increase
Motorcycles: 22% increase
2006-07:
Scooters: 53% increase
Motorcycles: 64% decrease
In year 2006 - 07,  both scooters and motorcycles fluctuate by more than 50%.
Therefore, the correct answer is (c)  2006-07